Twelve big celebs and political figures, including Jay-Z, Beyonce, are the victims of a hacker who has posted detailed information about what appears to be their finances … and we’ve learned law enforcement is on the case.

A website — we’re not disclosing the name — has posted social security numbers, mortgage amounts, credit card info, car loans, banking and other info of major celebs. In addition to Beyonce and Jay-Z … the site has snagged financial dossiers of Kim Kardashian, Paris Hilton, Mel Gibson, Ashton Kutcher, Joe Biden, Robert Mueller, Hillary Clinton, Eric Holder and LAPD Chief Charlie Beck.

The site was not able to get a lot on Joe Biden or Hillary Clinton, but most of the others on the list have had their financial info compromised.

Law enforcement sources tell TMZ … the LAPD has already launched an investigation. We’re told the FBI is looking into it.

Is there anything that you can think of that could come from this that’s not so good for the celebrities involved? Perhaps one of the above celebs spends way too much money on Valtrex perhaps? What do you think? Sound off with your thoughts in the comments below!